Span

Specify the interface to the device on the other side of the link. The following describes the typical case:

Short haul

Specify Short haul in the following instances:

·   A PBX terminates the line into the building

·   The network service provider has installed a smart jack at your site that implements a short haul interface. See your network service provider for this information.

Long haul

Specify Long haul in the following instances:

·   This adapter terminates the line into the building

·   The network service provider has installed a smart jack at your site that implements a long haul interface. See your network service provider for this information.